2800256 has 32 divisors (see below), whose sum is σ = 5654880. Its totient is φ = 1381120.

The previous prime is 2800249. The next prime is 2800267. The reversal of 2800256 is 6520082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16685 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (176715).

2^2800256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2800256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2827440).

2800256 is an abundant number, since it is smaller than the sum of its proper divisors (2854624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2800256 is a wasteful number, since it uses less digits than its factorization.

2800256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2800256 is about 1673.3965459508. The cubic root of 2800256 is about 140.9502700068.

The spelling of 2800256 in words is "two million, eight hundred thousand, two hundred fifty-six".